There are several possible causes for a vague pain in the stomach in the fifth month of pregnancy: first. A vague pain caused by the baby moving around inside the belly. Secondly. This is usually accompanied by vaginal bleeding and it is recommended to consult a doctor promptly. Third. Other diseases, such as gastrointestinal diseases, such as acute gastroenteritis, ulcerative colitis, etc., can cause a feeling of urgency and vague pain. Fourth. Some gynecological inflammatory diseases, such as adnexitis, etc. If you have a vague pain in your stomach in the fifth month of pregnancy, it is recommended to go to a regular hospital to improve the relevant examination and make a clear diagnosis.